新设计的高膨胀过油管桥塞服务,降低了作业成本,提高了可靠性

S. Eyuboglu, F. Heaney, P. Chamarthy, B. Powell, Chris Gullett
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引用次数: 0

摘要

通过油管桥塞(TTBP)服务是一种常见的电缆井干预服务,用于隔离较低的非生产层,以提高产量或桥塞和弃井。传统上,该服务只能在在线上运行,因为它需要一种独特的机电延长冲程坐封工具来设置这些类型的障碍。本文讨论了开发一种新的TTBP设计的挑战,部署在数字滑绳(DSL)上,以帮助优化服务成本。采用系统级分析分析了当前的电子线路TTBP业务,并确定了DSL部署面临的挑战。一般来说,与其他电缆封隔器相比,这些桥塞具有极高的膨胀比(2倍至4倍),因为它们在进入套管之前必须在完井过程中穿过严格的井下限制。因此,这些桥塞的坐封行程非常长,需要一种功率要求很高的特定坐封工具。TTBP的高膨胀率限制了压力等级,这种类型的封隔器需要在桥塞上安装水泥帽来完成修井作业。DSL不能从地面发送电力;因此,它有电力预算的限制。需要在冲程长度和可用功率之间找到适当的平衡,以实现成功的桥塞。弹性体堆和备用花瓣组件进行了重大重新设计,以实现可接受的膨胀比,同时最小化冲程长度。该功能允许开发具有更短冲程长度的电池供电坐封工具。在DSL上运行该服务,作业者可以在坐封桥塞之前确认深度相关性,并从井下传感器获得实时反馈,以确保原位桥塞的质量。此外,数字钢丝绳可提供精确的井底温度,这对于实现合适的水泥塞至关重要。本文将介绍现场试验的结果,表明与e-line相比,在DSL上运行这些插头节省了成本。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Newly Designed High Expansion Through-Tubing Bridge Plug Service to Reduce Operational Costs and Increase Reliability
Through-tubing bridge plug (TTBP) service is a common e-line well intervention service for isolating lower non-productive zones for improved production or plug and abandonment. Traditionally, this service was only run on e-line, as it requires a unique electro-mechanical extended stroke setting tool, to set these types of barriers. This paper discusses the challenges of developing a new design of the TTBP, deployed on Digital Slickline (DSL) to help optimize service costs. System-level analysis was adopted to analyze the current e-line TTBP service and identify challenges to DSL deployment. In general, these plugs have extremely high-expansion ratios (2x to 4x) compared to other wireline set barriers as they have to pass through tight downhole restrictions in the completion before passing into the casing. As a result, these plugs have an exceptionally long setting stroke, requiring a specific setting tool with high power demands. The high expansion ratio of the TTBP limits pressure rating and this type of barrier demands a cement cap on the plug to complete the intervention. DSL cannot send power from the surface; therefore, it has electrical power budget limitations. The right balance needs to be found between the stroke length and the available power to achieve a successful plug. The elastomer stack and the backup petal assembly were significantly redesigned to achieve an acceptable expansion ratio while minimizing stroke length. This feature allowed for the development of a battery-powered setting tool with a shorter stroke length. Running the service on DSL lets the operator confirm depth correlation before setting the plug and real-time feedback from downhole sensors to ensure an in-situ quality plug set. Moreover, digital slickline provides accurate bottom-hole temperature, which is critical in achieving a suitable cement plug. The paper will present results from field trials showing the cost savings of running these plugs on DSL compared to e-line.
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